Interior-player piano.



M. CLARK. I INTERIOR PLAYER PIANO.

APPLIOATION FILED MAY 12, 1909.

Patented Jan. 16, 1912.

3 SHEETS SHEET 1.

M. CLARK.

Patented Jan. 16, 1912.

3 SHEETS-SHEET 2.

Vfiffielses in 11161 JMM a 7%Ji g d flg g. A. M B M WW M. CLARK.

INTERIOR PLAYER PIANO.

APP'LIGATION FILED MAY 12, 1909.

1,014,949, Patented m, 16, 1912.

will

me seeich duct ed by h comm (mined h'vct 10 W005, if".

, with connect he bur, S,

n'ibe leudil, Uncut (5 dual tube by in 1mm 1' re p prinnested M 1 omnu action; mid i1 ted b e in? mini and M10 The duct "1: Bi *5, P and; 14*, to the re can lies Lemar I mung:

reinn rmuel registration-of said ports for cutting oil? grou S, if and P and extendto the supplemental action,

vided into two masses grpuped in the trunks,

p, p, respectively,- for passing around the harp or pedal support to reach the primary pneumatics of the principal'action, where one of the tubes'is distinctly shown in Fig. 1. connected in a manner which will be well understood as illustrating the Connection of the entire number comprising both said The flexible tubes, P

being dividedinto two masses which are grouped respect vely in the trunks, p, 3 top passing by the. carp .or pedal support, and thence 1n the subordinate trunks, 77 p, for passing by the ends of the principal act-ion V to reach'the primary neumatics of said supplementa'l action, with which one of said ducts is shown connected in Fig. 1 in a manner which will illustrate the connection with the remainder. 'The-tubes, P lead to the primary pneumatics at the end portions of the supplemental action, and the tubes, P lead to the primary pneumatics of the intermediate portion of said action, as seen in Fig. 2. As stated, the tubes, P and P are connected to the duct board, E, on which the valve-bar comprising two members, S, S, is :motunted, for registration of their ports 'with the corresponding ports of said duct board, and adapted to be moved for noncommunication thereof with the supplemental action. The tubes, P are also connected with the duct board,- E", as stated, the ports of the corresponding tubes of the valve bar which communicate with the ports of said tubes, P being positioned in the face \of the valve bar which bears upon the duct board so. as to be in registration witlrthe corres ending duct board ports when the valve ar is moved longitudinally for nonregistration of the ports connected with the tubes, P and I, the valve bar having a range of movement from the position of registration of the ports of the tubes, P and P to the position of registration of. the

ports of the tubes, 1, adequate'for an in 'termediate position at which all the ports of the bar are out of registration'with the corresponding ports of the board, that being the position in which the parts are.

shown in Fi s. Sand 4 from whicli fi 'ures it will be understood that movement of the valve bar, S, to the right will bring the ports of the tubes, E into registration with the ports of. the tubes, P and the ports, E,

into registration with the ports of the tubes,

Pflzand movement to the left will bring-the ports of the tubes E into registration with the ports of the tubes, 1, while the ports of the tubes, E arecut off from registration with the ports oi the tubes, P The two members, 53, S, of the valve bar are connected together for movei'nent as a unitary structure by a rigid yoke piece, 8, and ieaeee rer, S which is mounted in position for manipulation by the operator engages the valve bar in any convenient manner for ad justing the latter to either of the three positions indicated.

The supplemental action is designed for playing any part which is to be distinguished, or playing any part which is to be made prominent with respect to any other part, as for playing the melody more prominently than the accompaniment with which-it is associated; and for that purpose, the supplemental action is designed to operate upon the manual keys more forcibly equal tothat which accommodates four banks of the principal action. This deeper stroke is accommodated, as will be noticed,

by the proportions of the two arms of the lovers, M, the rear arm connected with the pneumatic being double the length of the forward arm connected with the pitmen, so

that the full value of the extra depth of the motor pneumatic for producing a forceful stroke is obtained by the shortened stroke of the forward end of the lever operating bymeans of the pitmen upon the key nearer to its fulcrum. But for further and more markeddistinction between theforce of the two actions uponthe keys, it is preferred to provide for operating the pneumatic of the supplemental action from an, air chamber exhausted to a higher degree than that from which the principal action. is operated. For that purpose the principal action is connected by an air trunk, 0 with the low tension chamber of a bellows, C and the supplemental action is connected by an air trunk, 0, with the high tension chamber of the bellows, C, both said bellows being con-'.

nected with the pumpers, D, in a manner needing no further description. I'do not exclude means for changing these connections; and such means are fully described in my application Serial Nos-488,625, filed April 8, 1909 (Patent No. 1,009,828, Nov.-28,'

1911) but for the purpose of the present lap? plication it may be understood that the prin cipal action would be generally connected with-the low tension and the supplemental action would be generally connectedwith the high tension.

ll claim}- i 1; In piano, in combination with the manual keys, principal pneumaticgnotion and a supplemental pneumatic action fm now: see

to three positions, at one of which the first set of ducts of said second element registers as stated, and at another of which the second set of ports of the second element registers as stated, and at the third of Which neither of said sets registers; flexible tubes leading from the supplemental action to said second element connected thereto at said first set of ports, and flexible tubes from the principal action leading to saidsecond element and connected thereto at said second set of ports.

7. In a piano, in conihination'with the manual keys, two pneumatic actions for operating independently of each other upon the keys; a tracker device comprising thre e groups of ducts, one for connection with the princlpal action, a second for connection with the supplemental action, and a third for connection with both actions; a duct board and a valve bar thereon, one of said elements having a set of ports connected With the tracker board ducts of the second and third groups, the other element having a set of ports for registration with both as stated, and at the third of which neither of said sets registers; flexible tubes leading from the supplemental action'to said second element connected thereto at said first set of ports, and flexible tubes from the, principal action leading to said second eieinent and connected thereto at said second set'of ports, and means for moving said two elements to shift said registration.

In testimony hereof, I have hereunto set my hand at Chicago, Illinois, this 8th day or" May, 1909.

lii'ELVILLE CLARK. Witnesses J. S. ABBOTT, M. GERTRUDE Any. 

